Excavator



No Model.) '3 sneets-sneec 1`. H. R. KEITHLEY.

BXGAV-ATOR.

Patented July 28, 1896.

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3 Sheets-Sheet 2.

H. R. KEITHLBY.

(No Model.)

BXGAVATOR.

N6. 664,696. Patented July 26., 1696.

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3 sheets-sheet 3..

ma Mael.) H R KBITHLEY BX'GAVATOR.

Patented July 28, 1896;

71 faz 655 es UNITED STATES PATENT OFFICE.

HERBERT R. KEITHLEY, OE BUFFALO, NEV'YORK.

EXCAVATO R.

SPECIFICATION forming part of Letters Patent' No. 564,695', dated July28, 1896. Applicatifn filed January 24, 1895. Serial No. 536,007.` (llomodel.)

To all whom, it 17mg/ concern.:

Beitknown that I, HERBERT R. KEITHLEY, a citizen of the UnitedStates,residiu g at Buffalo, in the county of Erie and State of NewYork, have invented a new and useful Improvement in Excavators, of whichthe following is a specification.

This invention relates to that class of excavating-machines in which avertically-reciprocating cutter, spade, 0r plow is employed, wherebyperpendicular sect-ions of earth are successively cut from the uprightend or side walls of a trench or ditch.

The object of the invention is to improve the construction of suchmachines in several particulars; and it consists in the mattershereinafter described, and pointed out in t-he appended claims.

In the accompanying drawings, consisting of three sheets, Figure l is alongitudinal sectional elevation of my improved excavating apparatus,showing the saine in connection with a sewer-excavation. Fig. 2 is afragmentarysectional elevation of the cutterbar and its actuatingmechanism, showing the supplemental rack-bar in engagement with theactuating-wheel. Fig. 3 is a similar View showing the cutter-bar raisedand its movable tooth out of gear with the actuatingwheel. Fig. et is asimilar view showing said tooth in gear with the actuating-wheel. Fig. 5is a transverse vertical section of the apparatus in line 5 5, Eig. 1,lookingtoward the right. Fig. 6 isa similar section in line 6 6, Fig. l,looking toward the left. Fig. 7 is a top plan view of the apparatus.'Fig. 8 is a fragmentary horizontal section in line S S, Fig. l. Fig. 9is a horizontal section of the cutter and bucket iu line 9 9, Fig. 1.

Like letters of reference refer to like parts in the several figures.

A represents a boiler, andB an engine, both of ordinary construction,which are mounted upon a portable frame or truck, the wheels of whichrun upon longitudinal tracks C, laid along opposite sides of the trenchor ditch to be excavated. In the construction shown in the drawings, theframe of the truck consists of lower side beams D, upper side beams D,upright beams D2, D3, and D4,upper transverse connecting-bars D5, andalower transverse connecting-bar D6;

E is the vertically-reciprocating cutter, spade, or plow, and F anupright rack-bar, which carries the cutter at its lower end. The cutteris preferably V-shaped in cross-section and its walls recede downwardand rearward from its salient ridge, so as to turn the earth rearward asit penetrates the ground. The reciprocating rack or cutter bar E isguided with -its upperV portion between the upper transverseconnecting-bars D5 and bears with its lower frontportion against thelower connecting-bar D6. The rack-bar preferably consists of a pair ofupright parallel side 'bars and a series of horizontal rounds or boltsf, which connect the side bars and form the teeth of the rack-bar.

G is a gear-wheel which meshes with the teeth of the cutter-bar andwhereby the latter is raised and lowered for reciprocating the cutter.This gear-'wheel is secured to a horizontal shaft g, which is drivenfrom a counter-shaft h by a pinion h', secured to the latter and meshingwith a gear-wheel g', secured to the shaft g. Motion is transmitted tothe counter-shaft t from the main drivingshaft t' by a belt 11, runningaround pulleys t2 and i3, mounted on said shafts, respectively.V

Vhen the actuating-wheel turns forwardly,

or in the proper direction to lower the cutterbar, the latter continuesto descend until the uppermost of its series of teeth has clearedthe-teeth of the actuating-wheel, as shown in Fig.` 2, when the bar isarrested, while the' actuating-wheel continues to rotate.

J is a supplemental rack-bar carried by the cutter-bar and adapted to bemoved into engagement with the teeth of the actuatingwheel G forstarting the bar on its upward stroke when the movement of theactuatingwheel is reversed. This rack-bar consists of a pair ofdepending bars pivoted at their upper ends to the cutter-bar, above theactuating-wheel G, and having one or more teeth or rounds j', which,when brought into vertical alinement with the series of rounds of thecutter-bar, form a continuation or eXtensiou thereof, whereby' thecutter-bar is elevated by the backward rotation of the actuating-wheel.The supplemental rack-bar is normally swung aside for .holding its teethIOO out of gear with the actuating-wheel by 'l 'i means of a weight jg,secured to the pivot of the said rack-bar. The latter is moved intoengagement with the actuating-wheel by a cord i3, secured thereto,passing over a guide-pulley `7"* and terminating in convenient reach ofthe engineer or other attendant.

k is a detentwheel whereby the cutter-bar is held in its elevatedposition and which, in the elevated position of the cutter-bar, engageswith a short series of teeth or rounds f', arranged on the bar below themain series .of teeth f, as shown in Fig. 3. The detentteeth f arearranged in a vertical plane slightly in advance of the plane of themain series of teeth, and the detent-wheel is so arranged relatively tothe two series of teeth that it always clears the upper or main series,but meshes with the lower or detent series when the cutter-bar iselevated to its highest limit.

The detent-wheel 7c is looselymounted on a transverse shaft lo',journaled in the uprights D3, and carries a pawl 7a2, which engages witha ratchet-wheel los, secured to the shaft k', and which permits thedetent-wheel to turn backward freely when engaged by the short series ofteeth f', but prevents the detentwheel from turning on the shaft in theopposite direction.

Z is a propelling rope or cable secured to and wound upon the shaft loand passing downward from said shaft around a guide-roller l', journaledon the lower portion of the truck, and thence forward to a fixed crossbar or anchor Z2, to which it is secured. This rope or cable holds theshaft k against forward rotation. When the lower series of teeth o'f thecutter-bar are in engagement with the detent-wheel, the pawl of thelatter engages against the abrupt face of a tooth of the ratchet-wheel,and as the shaft is prevented from turning forward by the anchored ropeZ the detent-wheel is also held against forward rotation, therebysupporting the cutter-bar in its elevated position.

Z3 is a ratchet-wheel secured to the shaft 7c' and engaging with adetent-pawl Z4, pivoted to the adjacent upright D3. This pawl isarranged to prevent retrograde movement of the shaft k', whereby thepropelling cable or rope is prevented from unwinding from the shaftduring the backward rotation of the detent-wheel.

When the engine is reversed for elevating the cutter-bar, theactuating-wheel raises the bar until the lowermost tooth f2 of its mainseries clears the actuating-wheel. In order to bring this last toothinto operative engagement with the actuating-wheel for again loweringthe cu tter-bar, said tooth is arranged to slide freely in verticalslots f3, formed in the side pieces of the cutter-bar, as more clearlyshown in Figs. 3 and 4. This movable tooth tends to rest in the lowerends of the slots by gravity, and when, during the upward stroke of thecutter-bar, it comes into gear with the actuating-wheel` it is moved bya toothof the latter against the upper ends of its slots, thus acting asa fixed tooth. As soon as this tooth reaches a position in which it isnot forced against the upper ends of its slots by the teeth of theactuating-wheel, it drops by gravity into the path of the teeth of theactuating-wheel, as shown in Fig. 3, when it is again raised ordeflected, the tooth reciprocating in its slots somewhat in the mannerof a pawl and ratchet, and allowing the actuating-wheel to continue itsbackward movement without aifectin g the cutterbar.

W'hen the motion of the actuating-wheel is reversed for lowering thecutter-bar, the tooth of the actuating-wheel immediately above themovable tooth of the cutter-bar bears against the upper side of themovable tooth f2 and causes it to abut against the lower ends of itsslots, as shown in Fig. 4. The tooth now acts as a rigid tooth andtransmits the movement of the actuating-wheel to the cutter-bar, therebystarting the latter on its downward stroke The detent-wheel is in meshwith the lower series of the cutter-bar teeth'during the initial portionof thedownward stroke of the cutter-bar, and it is, therefore, compelledto turn forward until the uppermost of such teeth has cleared it. Thisforward rotation of the detent-wheel is imparted to the shaft k',causing the propelling rope or cable to be wound upon said shaft, and asthe opposite end of the cable is anchored its bight impinges against thetruck-roller Z and shifts the machine forward a greater or lessdistance, the extent of which is determined by the diameter of the shaftla and the length of the series of detent-teeth on the cutter-bar. Thedetent device thus serves not only as a. stop for arresting the downwardmovement IOO of the cutter-bar, but also effects the autoprovided onopposite sides with horizontal4 pivots m', which are arranged inhorizontal slots m2, formed in the supporting-arms lm, whereby thebucket is allowed to oscillate on said arms for dumping its contents,and also permitted to move toward and from the cutter for severing theslice of earth transversely opposite the lower edge of the' cutter.front edge of the bucket-bottom is preferably sharpened to facilitatethis action of the bucket. The bucket-pivots are arranged somewhat inrear of the middle of the bucket, so that the front portion of thelatter overbalances its rear portion, the bucket being normally held inits horizontal position by IIO The

lugs or stops m3, arranged on opposite sides thereof, in front of itspivots, and bearing upon the upper edges of the connecting-arms m. Thebucket is vibrated by means of an oscillatory frame or lever which, inthe construction shown in the drawings, consists of a pair of uprightmembers N, which are mounted near their middle upon a transverserock-shaft or pivot N. The latter is arranged with its ends in verticalslots n, formed in the uprights D4. These slotsV permit the oscillatingframe to reciprocate vertically with the bucket and the cutter. Themembers of the oscillating frame are provided at their lower ends witheyes or bearings which receive the pivots of the buckets, as shown inthe drawings. The lower edges of the arms m are preferably sharpened, asshown, to more readily penetrate the ground.

o is a horizontal rack-bar, whereby the oscillating frame N is throwninto gear with the actu ating gear-wheel G at the rsame time that thecutter reaches the extremity ofits downward stroke, and whereby thebucket is swung forwardsufciently to sever the detached section ,ofearth. This rack-baris secured at its rear 'end to the oscillatingframe, above the pivot of the latter, vand is adapted to mesh with theupper side of the actuatingwheel G during the forward rotation of thelatter, whereby said rack-bar is caused to move rearward until its teethclear the actuating-wheel, thereby swinging the upper arm of theoscillating frame backward and its lower arm forward, and causing thefront edge of the bucket-bottom to penetrate the section of earth.

The horizontal rack-bar ois so arranged on the oscillating framerelatively to theactuating-wheel G that in the descent of theoscillating frame and the cutter-bar the rack-.bar comes into engagementwith the actuatingwheel at about the same time that the teeth of thecutter-bar leave the actuating-wheel.

p is a stop which is arranged in the path of the bucket and againstwhich the rear portion of the bucket strikes in ascending, therebydumping the same automatically.v This stop consists of a rigid armdepending from a cross-bar p', which connects the upper side beams 'ofthe portable main frame.

Q is a conveying-car into which the elevated earth is dumped, andwhereby the same is carried to the desired place of deposit. This carruns upon inclined tracks q, which are preferably laid upon a portabletrestle or platform R, connected at its front portion to the truck-frameand supported at its rear portion upon wheels r, which may run upon themain tracks C when the earth is to be delivered at the rear end of thetrench, asis desirable in sewer-work.

In order to permit the conveyer-car to run in different directions fromthe machine, the trestle is swiveled at its head to the truckframebymeans of a vertical pivot r', turning in a socket r2, as shown'in Fig.'1, or by any other suitable means. 'l

The conveyer-car is preferably operated automatically in conjunctionwith the vertically-movable bucket. In the construction shown in thedrawings, this is eected by draft ropes or cables s, secured to the carand passing forwardly around guide-wheels s', journaledon the uprightsD4, thence upward around guide-wheels s2, journaled at the upper end ofthe oscillating frame, and thence to a cross-rod, which is secured tothe uprights D4 and to which the cables are fastened. By thisarrangement, when the oscillating frame ascends with the cutter-bar, the

cables s are doubled on opposite sides of the oscillating frame, owingto their attachment to the uprights D4, thereby drawing the horizontalportions of the cables forward and upward around the fixed guide-wheelss', and pulling the conveyer-car toward the head of the trestle. Theparts are so proportioned that the conveyer-car reaches the head of thetrestle in thevproper position to' receivethe contents of the elevatedbucketj before the bucket strikes the dumping-stop p. When the bucket,again descends, the cables are slackened, allowing the loadedconveyercar to run by gravity to the rear end of the trestle fordischarging its contents. A

The bottom q of the conveyer-car is preferably hinged at one end, asshown in Fig. l,

so that it may swing downward for dumping the contents of the car. Thehinged bottom is held in its closed position by a roller q2, journaledon the under side of the bottom, at 0r nearits free end, and runningupon a longitudinal track t, arranged on the trestle between the tracksof the conveyer-car. The rear or terminal portion of this intermediatetrack is inclined abruptly at a greaterpitch than its main portion, asshown at t' in Fig. l, whereby the hinged bottom is allowed to open orswing downward under' the weight of the car contents when itssupporting-roller runs down the receding or depressed terminal portionofsaid track, as shown in the lastmentioned figure. When the car is drawntoward the head of the trestle, the free end of its hinged bottom israised 4by the abrupt incline t until the supporting-roller of the IOOIIO

bottom reaches the main portion Vof the interraised to its highestposition, after making a cut in the wall of the excavation, the bucketand its oscillating frame are also elevated A and the conveyor-car is atthefhead of the trestle. The elevated parts are held in this position bythe detent-wheel 7c meshingvwith thelower series of the cutter-barteeth. The

shaft of the detent-wheel is held against turning by the cable Z, andthe weight of the portable truck and superposed parts predominate overthat of the elevated cutter and bucket, so that the apparatus remainsstationary. Upon now reversing the engine, so as to turn theactuating-wheel forward, the cutter-bar is lowered and the initialportion of this movement is transmitted by the detent-wheelto the shaftof the latter, thereby winding the cable Zupon said shaft and propellingthe machine forward preparatory to making the cut. The cutter-barcontinuiu g its downward stroke causes the cutter to penetrate theground and remove a section of earth from the wall of the trench, thebucket descending with the cutter and receiving the detached earth,which latter is deflected into it by the cutter. At the same time thatthe cutter reaches the limit of its downward stroke, caused by the mainseries of teeth leaving the actuating-wheel, the shifting rack-bar o ofthe oscillating frame N is brought into gear with the actuating-wheel Gby the descent of the oscillating frame, thereby vibrating the latterand causing the bucket to swing toward the cutter, whereby the frontedge of the bucketbottom cuts the detached section of earthtransversely. Practically all the earth rack-bar o clears the actuatingwheel G, when I tilt backward and dump its contents into theconveyer-car. During the dumping of the bucket the bucket and the partsconnected with it are held in an elevated position by the detent-wheelk, which at that time is in engagement with the lower series of teeth ofthe cutter-bar. The engine is now again reversed and the cutter-bar ismoved into gear with the actuating-wheel Gr by means of the supplementalrack-bar J, whereby the cutter is again lowered for removing anothersection of the excavation, as before described. As the oscillating frameN descends with the cutter, the draft-cables running around theguide-wheels at the upper end of the said frame are permitted to slackenor pay out, thusY allowing the conveyer-car, which has been loaded withthe earth of the preceding cut, to run down the inclined trestle to theplace of deposit. The conveyer-car is thus Y automaticallydrawn to thehead of the trestle to meet the loaded bucket during the ascent of thelatter, and allowed to return to the rear end of the trench or otherplace of .de-` posit during the time that the cutter descends to removethe next section of earth'.

By combining the bucket with the plow` or cutter in the manner shown thebucket remains in close proximity to the cutter throughout the strokethereof, and it thus receives the loose earth as rapidly as it isdetached from the cutter, thus saving the cost of handlabor, which wouldotherwise be required for shoveling the earth into the bucket. Thecutting action of the bucket, produced by vibrating the sametransversely of the plane of movement of the vertically-reciprocatingcutter, insures the discharge of nearly all of the loosened earth intothe bucket, so that very little hand-labor is required for clearing orfinishing the bottom of the trench.

The stroke of the verticallymovable cutter or spade may be increased ordiminished by lengthening or shortening the series of teeth on thecutter-bar, the side members of the latter being for this purpose madesufficiently long and the openings which receive the teeth or roundsextending to the upper ends of the members, so that additional teethrorrounds may be inserted for increasing the stroke of the cutter or agreater or less number removed from the top of the series fordiminishing its stroke. In order to permit a cor responding adjustmentof the rack-bar 0 on the oscillating frame, the latter is provided witha vertical series of openings fn', which receive the removable carryingrod of the rack-bar.

In the drawings a steam-engine is shown for operating the machine, butany other suitable motive power may obviously be substituted therefor.

I claim as my inventionl. The combination with avertically-reciprocating spade or cutter, of avertically-reciprocatingreceptacle for the excavated material moving with the cutter andsupported opposite the cutter with its side edge which is nearest thecutter located adjacent to the cutting edge of the same, whereby thesaid receptacle is adapted to receive the excavated material by gravityin the descent of the cutter, substantially as described. Y

2. The combination with a vertically-reciprocating spade or cutter, of avertically-reciprocating bucket or receptacle for the excavated materialsupported opposite and adjacent to the spade or cutter and connectedwith the latter, by means preventing vertical movement of the bucketrelatively to the cutter, whereby the bucket reciprocates in yunisonwith the spade or cutter, substantially as set forth.

3. The combination with a vertically-reciprocating spade or cutter, of avertically-reciprocating bucket or receptacle supported opposite andadjacent to the spade or cutter, said bucket or receptacle being movableat an angle to the plane of movement of the cut- IOO ter, and havinga'cutting edge for severing the detached Asection of earth transverselysubstantially as set forth.

4. The combination with' a vertical reciprocating spade or cutter of abucket or receptacle connected with the cutter by connecting'means whichmaintains the receptacle rigidly opposite the cutter but affordsmovement of the receptacle horizontally to- Ward and from the cutter,substantially as described.

5. The combination with a vertically-reciprocating spade or cutter and abucket orreceptacle, of a vertically-movable bar to the lower end ofwhich the cutter is attached and which is provided Withrigid armssustaining the receptacle opposite the cutter, substantially asdescribed.

6. The combination With a reciprocating spade or cutter of avertically-reciprocating bucket or receptacle supported adjacent to thespade or cutter by means Which maintain it rigidly opposite the cutter,but leave it free to move toward and from the latter and an oscillatoryframe connected with said bucket or receptacle, for giving horizontalmovement thereto, substantially as setforth.

7. The combination With a 'reciprocating spade or cutter and slottedarms or brackets secured thereto, of a bucket Yor receptacle movabletoward and from the cutter and hav? ing pins or pivots Which slide inthe slots of said arms or brackets, substantially as del scribed.

8. The combination with a vertically-reciprocating spade or cutter andan actuating de`- vice for giving vertical movement thereto, of a bucketor receptacle which moves vertically witl1,but is capable of movinghorizontally toward and from said spade or cutter, a vibratory frameconnected With said bucket for moving the same horizontallyand adetachable actuating mechanism wherebyl said vibratory frame is actuatedfrom said actuating.

device, substantially as set forth.

9. The combination With a reciprocating spade or cutter and a receptaclemovable with the same, of a vertically-movable bar to which the cutteris attached 'and'which is provided with rigidv arms with which thereceptacle has horizontally-sliding connection, means acting on the barfor moving the same vertically and means acting on the receptacle forgiving hori# zontal movement to the same, substantially as described.

10. YThe combination With a vertically-'movable cutter and a receptaclesustained oppositethe cutter but movable horizontally'toward and fromthe same, of a vertically-mov'- able bar attached to the cutter, avibrating frame for actuating the receptacle connected and movingvertically with "the said bar, means acting on said bar for movingvertically the said receptacle and means acting on said vibratingframefor giving horizontal motion to the saidY receptacle, substantiallyas described.'

V11. The combination with a reciprocating cutter and a toothedactuating-Wheel, of a bucket or receptable movable toward and from saidcutter, a reciprocating vibratory frame connected with said bucket, anda rackbar secured to said vibratory frame and adapted lto engage Withsaid actuating-Wheel, substantially as set forth.

12. The combination With a reciprocating cutter, a rack-bar attached tothe same, a toothed actuating-Wheel engaging saidv rackbar, a receptablemovable toward and from said cutter,a vibratory frame connected withsaid receptacle, and a rack-bar connected with the vibratory frame andadapted to engage said actuating-Wheel, substantially as described.

13. The combination With a main frame ot` a reciprocating cutter, asupporting-bar attached tothe same, a receptacle connected with thesupporting-bar by means which hold the'receptacle rigidly opposite thecutter, but aords movement thereof horizontally toward and from thecutter and a vibrating frame for actuating the receptacle having bothpivotal and vertically-sliding connection with the main frame,substantially as described.

14. The combination with a main frame, of a reciprocating cutter, yasupporting-bar attached tothe cutter, a receptacle connected with'thesupporting-bar by means holding the receptacle rigidlyA opposite'thecutter, but affording horizontal movement of the receptacle toward' andfrom the cutter, a pivoted vi- IOO brating frame fora'ct'uating thereceptacle,

as described.

i V15. The combination With a pair of verti-` cally-'slotted uprights ofthe main frame, of`

a reciprocating cutter, an actuating-Wheel, a reciprocating vibratoryframe'having a rockshaft or pivot arranged .in the slots offsaiduprights, a bucket or receptacle connected with the lowerportion of saidvibratory frame, and a'rack-bar attached to said vibratory frame andadapted to engage with said actuating-Wheel, substantially as set forth.

16. The combination With a vertically-recipro'cating cutter, of a bucketor receptacle which is supported opposite to and moves vertically withthe cutter, is movable horizontally toward and .from the same, and isalso pivotally supported to,v permit it to Vbe dumpe'd,'substantially asdescribed.

17. 'The combination with a cutter, a bar attached 'to the same andprovided with sup- IIO porting-arms, and a receptacle having both 1S.The combination With'a cutter, verticallylmovable supportingbar attachedto thesame and means for moving said bar in.

both directions, of means for supporting the bar in itselevated'position comprising a gearpinion provided With a pawl andratchet, and a rack on the said bar adapted for engagement with saidpinion, substantially as described.

19. The combination with a movable supporting-frame, a cutter and avertically-movable bar attached to the cutter, of means for moving thesaid frame comprisinga rotating pinion, mounted on the frame and havingoperative connection With a Winding-drum, a cable connecting said drumWi th a stationary object, and a rack on said bar adapted for engagementwith said pinion, substantially as described.

20. The combination with a movable supporting-frame, of a reciprocatingcutter, a supporting-bar attached to the same, a shaft carrying agear-pinion, a rack-bar on the supporting-bar for engagement With saidpinion and a propelling-cable attached to a stationary object andadapted to be Wound on the said shaft, substantially as described.

2l. The combination With a movable supporting-frame, of a spade orcutter, a reciprocating rack-bar guided in said supportingframe andcarrying the cutter, a pinion engaging With said rack-bar having ratchetengagement with its own shaft, and a propellingcable Woundv upon theshaft of said pinion and connected at its other end with a stationaryobject, substantially as set forth.

22. The combination with a movable supporting-frame having aguide-Wheel, of a spade or cutter, a reciprocating supportingbar havingrack-teeth, said bar being guided in said supporting-frame and carryingthe cutter, a pinion engaging with said rack-bar, and a propelling-cablesecured at one end to the shaft of said pinion, passing around theguide-Wheel of the movable frame, and having its opposite end anchoredto a stationary part, substantially as set forth.

23. The combination with a movable supporting-frame, of a cutter, asupporting-bar attached to said cutter having a set of main rack-teethand a series of auxiliary rack-teeth out of line with the main teeth, anactuating- Wheel engaging the main teeth, and a propelling device forthe frame embracing a gearpinion adapted to engage the auxiliary teeth,substantially as described.

24. The combination with a portable supporting-frame, of a cutter, areciprocating supporting-bar carrying the cutter and having a series ofmain rack-teeth and a series of auxiliary rack-teeth arranged out of theplane of the main teeth, an actuating-Wheel adapted to engage with themain teeth of said bar, a pinion adapted to engage with the auX- ili'aryteeth of the bar, and a propelling-cable whereby the movement of theshaft of said pinion is transmitted to the portable frame, substantiallyas set forth.

25. The combination With a movable supporting-frame, of a cutter, areciprocating supporting-bar carrying the cutter and having'a series ofmain rack-teeth and a series of auxiliary rack-teeth arranged out of theplane of the main teeth, an actuating-wheel adapted to engage with themain teeth of said bar, a pinion adapted to engage with the auxiliaryteeth of the bar, and mounted loosely on its supporting-shaft, a pawland ratchet connecting said pinion with its shaft, and apropelling-cable connected With said pinionshaft and operating upon themovable snpporting-frame, substantially as set forth.

26. The combination with a cutter of a supporting-bar for'actuating thesame, provided with rack-teeth, an actuating-Wheel engaged with saidbar, and a supplemental rack-bar movably connected with saidsupporting-bar and adapted to form a continuation of the rack-teeththereof, substantially as described. 27. The combination with a cutterand main supporting-bar carrying the same', provided With rack-teeth, ofan actuating-wheel engaging with said rack-teeth, and a supplementalrack-bar mounted on' said main bar and adapted to form a continuation ofthe rack-teeth thereof, substantially as set forth. 28. The combinationwith a cutter and the reciprocating supporting-bar carrying the same andprovided with rack-teeth of an actuating-Wheel engaging With said bar, asup- 'plemental 'rack-bar pivoted to said reciproeating bar and forminga continuation of the teeth thereof, a device for holding saidsupplemental rack-bar out of its operative position, and a shiftingdevice for moving said supplemental rack-bar into its operativeposition, substantially as set forth.

29. The combination with a cutter, of means for actuating the same,embracing a rack-bar, and an actuating-Wheel engaging the same, saidrack-bar having a reciprocating tooth, substantially as described.

30. The combination witha cutter, of arreciprocatin g rack-bar carryingsaid cutter, and having a reciprocating tooth, and an actuating-Wheelengaging with said rack-bar, substantially as set forth.

31. The combination with a cutter, of a reciprocating rack-bar having aseries of stationary teeth and provided at one end of said series withlongitudinal slots, a reciprocating tooth sliding in said slots, and anactuating- Wheel engaging with said rack-bar, substantially as setforth.

32. The combination with a vertically-movable bucket or receptacle, of avertically-movable frame carrying the same, a conveyingcar, and a cableattached to the car'an'd having operative connection with the saidvertically-movable frame, substantially as described.

33. The combination with a vertically-mov'- able bucket or receptacle,of a vertically-movable frame carrying the same, a conveyingcar, and acable attached to the car and having operative connection with the saidvertically-movable frame through the medium of IOO IIO

one or more pulleys, whereby the movement of the car is made greaterthan that of the frame, substantially as described.

34. The combination with the main frame, of a bucket or receptacle, areciprocating frame guided on the main frame, and connected with saidbucket, a guide-wheel arranged on the main frame below the upper end ofsaid reciprocating frame, a conveyingcar, and a draft-cable connectedwith said car, passing around said guide-wheel and actuated by saidreciprocating frame, substantially as set forth.

35. The combination with the main frame, of a bucket or receptacle, areciprocating frame guided on the main frame connected with said bucket,and provided at its upper end with a guide-wheel, a guide-wheel arrangedon the main frame below the upper end of said reciprocating frame and adraftcable passing around said guide-wheels and secured at one end tothe conveyer-car and at its other end to the main frame, substantiallyas set forth.

36. The combination with track-rails and a conveyer-car, of an auxiliarytrack having a depressed or downwardly-receding portion; theconveyer-car having a movable bottom provided with a rollerl which runsupon said auxiliary track, substantially as set forth.

37. The combination with track-rails and a conveyer-car, of an auxiliarytrack having a depressed or downwardly-receding portion, saidconveyer-car having a hinged bottom detached at its free end, and aroller journaled in the under side of the hinged bottom and running uponsaid auxiliary track, substantially as set forth.

38. The combination with the main frame and a vertically-reciprocatingframe guided thereon, of a bucket or receptacle pivoted to saidreciprocating frame, a stop arranged on the main frame in the path ofthe bucket, and a track or trestle for a conveyer-car having its headarranged underneath said stop, substantially as set forth.

Witness my hand this 18th day of January,

HERBERT R. KEITHLEY. Witnesses:

CARL F. GEYER, KATHRYN ELMoRE.

